@article{50840,
  abstract     = {{<jats:p>Superconducting nanowire single-photon detectors (SNSPDs) have been widely used to study the discrete nature of quantum states of light in the form of photon-counting experiments. We show that SNSPDs can also be used to study continuous variables of optical quantum states by performing homodyne detection at a bandwidth of 400 kHz. By measuring the interference of a continuous-wave field of a local oscillator with the field of the vacuum state using two SNSPDs, we show that the variance of the difference in count rates is linearly proportional to the photon flux of the local oscillator over almost five orders of magnitude. The resulting shot-noise clearance of (46.0 ± 1.1) dB is the highest reported clearance for a balanced optical homodyne detector, demonstrating their potential for measuring highly squeezed states in the continuous-wave regime. In addition, we measured a CMRR = 22.4 dB. From the joint click counting statistics, we also measure the phase-dependent quadrature of a weak coherent state to demonstrate our device’s functionality as a homodyne detector.</jats:p>}},
  author       = {{Protte, Maximilian and Schapeler, Timon and Sperling, Jan and Bartley, Tim}},
  issn         = {{2837-6714}},
  journal      = {{Optica Quantum}},
  number       = {{1}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Low-noise balanced homodyne detection with superconducting nanowire single-photon detectors}}},
  doi          = {{10.1364/opticaq.502201}},
  volume       = {{2}},
  year         = {{2024}},
}

@article{54815,
  abstract     = {{<jats:p>Broadband quantum light is a vital resource for quantum metrology and spectroscopy applications such as quantum optical coherence tomography or entangled two photon absorption. For entangled two photon absorption in particular, very high photon flux combined with high time-frequency entanglement is crucial for observing a signal. So far these conditions could be met by using high power lasers driving degenerate, type 0 bulk-crystal spontaneous parametric down conversion (SPDC) sources. This naturally limits the available wavelength ranges and precludes deterministic splitting of the generated output photons. In this work we demonstrate an integrated two-colour SPDC source utilising a group-velocity matched lithium niobate waveguide, reaching both exceptional brightness 1.52⋅10<jats:sup>6</jats:sup>pairssmWGHz and large bandwidth (7.8 THz FWHM) while pumped with a few mW of continuous wave (CW) laser light. By converting a narrow band pump to broadband pulses the created photon pairs show correlation times of Δ<jats:italic>τ</jats:italic> ≈ 120 fs while maintaining the narrow bandwidth Δ<jats:italic>ω</jats:italic><jats:sub>
      <jats:italic>p</jats:italic>
    </jats:sub> ≪ 1 MHz of the CW pump light, yielding strong time-frequency entanglement. Furthermore our process can be adapted to a wide range of central wavelengths.</jats:p>}},
  author       = {{Pollmann, René and Roeder, Franz and Quiring, Victor and Ricken, Raimund and Eigner, Christof and Brecht, Benjamin and Silberhorn, Christine}},
  issn         = {{1094-4087}},
  journal      = {{Optics Express}},
  number       = {{14}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Integrated, bright broadband, two-colour parametric down-conversion source}}},
  doi          = {{10.1364/oe.522549}},
  volume       = {{32}},
  year         = {{2024}},
}

@article{57862,
  abstract     = {{The latest applications in ultrafast quantum metrology require bright, broadband bi-photon sources with one of the photons in the mid-infrared and the other in the visible to near infrared. However, existing sources based on bulk crystals are limited in brightness due to the short interaction length and only allow for limited dispersion engineering. Here, we present an integrated PDC source based on a Ti:LiNbO3 waveguide that generates broadband bi-photons with central wavelengths at 860 nm and 2800 nm. Their spectral bandwidth exceeds 25 THz and is achieved by simultaneous matching of the group velocities (GVs) and cancellation of GV dispersion for the signal and idler field. We provide an intuitive understanding of the process by studying our source’s behavior at different temperatures and pump wavelengths, which agrees well with simulations.}},
  author       = {{Roeder, Franz and Gnanavel, Abira and Pollmann, René and Brecht, Olga and Stefszky, Michael and Padberg, Laura and Eigner, Christof and Silberhorn, Christine and Brecht, Benjamin}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  number       = {{12}},
  publisher    = {{IOP Publishing}},
  title        = {{{Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared}}},
  doi          = {{10.1088/1367-2630/ad9f98}},
  volume       = {{26}},
  year         = {{2024}},
}

@inbook{57165,
  author       = {{Bauer, Anna Brigitte}},
  booktitle    = {{Wissenschaftsdidaktik als kritische Kommunikationsanalyse - Ein Sammelband zur Weiterführung eines Gedankens von Ludwig Huber}},
  editor       = {{Scharlau, Ingrid and Jenert, Tobias}},
  isbn         = {{978-3-8474-3070-4}},
  pages        = {{59--74}},
  publisher    = {{Barbara Budrich}},
  title        = {{{Methodische Einführung des Konzeptes Messunsicheheiten in der Physik - Sprachliche Analyse von Standardwerken}}},
  year         = {{2024}},
}

@unpublished{57233,
  author       = {{Weiler, David and Burde, Jan-Philipp and Costan, Kasim and Große-Heilmann, Rike Isabel and Kulgemeyer, Christoph and Riese, Josef and Schubatzky, Thomas}},
  booktitle    = {{PhyDid B - Beiträge zur DPG-Frühjahrstagung 2024 in Greifswald}},
  title        = {{{Förderung digitaler Kompetenzen von Physik-Lehrkräften im ComeNet Physik}}},
  year         = {{2024}},
}

@article{57028,
  abstract     = {{<jats:p>Lithium niobate and lithium tantalate are among the most widespread materials for nonlinear, integrated photonics. Mixed crystals with arbitrary Nb–Ta ratios provide an additional degree of freedom to not only tune materials properties, such as the birefringence but also leverage the advantages of the singular compounds, for example, by combining the thermal stability of lithium tantalate with the larger nonlinear or piezoelectric constants of lithium niobate. Periodic poling allows to achieve phase-matching independent of waveguide geometry and is, therefore, one of the commonly used methods in integrated nonlinear optics. For mixed crystals, periodic poling has been challenging so far due to the lack of homogeneous, mono-domain crystals, which severely inhibit domain growth and nucleation. In this work, we investigate surface-near (&amp;lt;1μm depth) domain inversion on x-cut lithium niobate tantalate mixed crystals via electric field poling and lithographically structured electrodes. We find that naturally occurring head-to-head or tail-to-tail domain walls in the as-grown crystal inhibit domain inversion at a larger scale. However, periodic poling is possible if the gap size between the poling electrodes is of the same order of magnitude or smaller than the average size of naturally occurring domains. This work provides the basis for the nonlinear optical application of lithium niobate tantalate mixed crystals.</jats:p>}},
  author       = {{Bollmers, Laura and Babai-Hemati, Tobias and Koppitz, Boris and Eigner, Christof and Padberg, Laura and Rüsing, Michael and Eng, Lukas M. and Silberhorn, Christine}},
  issn         = {{0003-6951}},
  journal      = {{Applied Physics Letters}},
  number       = {{15}},
  publisher    = {{AIP Publishing}},
  title        = {{{Surface-near domain engineering in multi-domain x-cut lithium niobate tantalate mixed crystals}}},
  doi          = {{10.1063/5.0210972}},
  volume       = {{125}},
  year         = {{2024}},
}

@article{57410,
  author       = {{Röder, J. and Gerhard, M. and Fuchs, C. and Stolz, W. and Heimbrodt, W. and Koch, M. and Ngo, C. and Steiner, J. T. and Meier, Torsten}},
  issn         = {{2469-9950}},
  journal      = {{Physical Review B}},
  number       = {{19}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Charge transfer magnetoexcitons in magnetoabsorption spectra of asymmetric type-II double quantum wells}}},
  doi          = {{10.1103/physrevb.110.195306}},
  volume       = {{110}},
  year         = {{2024}},
}

@article{57429,
  author       = {{Krueger, Bettina and Stutz, Bianca and Jakobsmeyer, Rasmus and Reinsberger, Claus and Buyken, Anette E.}},
  issn         = {{0742-0528}},
  journal      = {{Chronobiology International}},
  pages        = {{1--10}},
  publisher    = {{Informa UK Limited}},
  title        = {{{Relevance of high glycaemic index breakfast for heart rate variability among collegiate students with early and late chronotypes}}},
  doi          = {{10.1080/07420528.2024.2428203}},
  year         = {{2024}},
}

@inbook{57446,
  author       = {{Niederkofler, Benjamin and Strotmeyer, Anne and Kehne, Miriam}},
  booktitle    = {{Motorische Basiskompetenzen.  Konstrukt, Erfassung und Anwendung}},
  editor       = {{Hermann, Christian and Seelig, Harald and Ennigkeit, Fabienne}},
  isbn         = {{9783658457587}},
  issn         = {{2512-0697}},
  pages        = {{227--246}},
  publisher    = {{Springer Fachmedien Wiesbaden}},
  title        = {{{Interventionskonzepte zur Förderung von motorischen Basiskompetenzen}}},
  doi          = {{10.1007/978-3-658-45759-4_12}},
  year         = {{2024}},
}

@inbook{54380,
  author       = {{Breithecker, Jennifer and Kehne, Miriam}},
  booktitle    = {{Sport, Bewegung und Gesundheit in internationaler Perspektive. Festschrift zur Verabschiedung von Prof. Dr. Hans Peter Brandl-Bredenbeck}},
  editor       = {{Hofmann, Jürgen and Weiß, Kathrin and Breithecker, Jennifer and Kroll, Lena and Röger-Offergeld, Ulrike}},
  pages        = {{142--152}},
  title        = {{{Duale Karrieren: Chronischer Stress und protektive Ressourcen - Längsschnittstudien im Vergleich zweier Verbundsysteme}}},
  year         = {{2024}},
}

@inproceedings{57501,
  author       = {{Güldenpenning, Iris and Böer, Nils Tobias and Kunde, Wilfried and Giesen, Carina G. and Rothermund, Klaus and Weigelt, Matthias}},
  booktitle    = {{Abstracts of the 66th Conference of Experimental Psychologists}},
  editor       = {{Fröber, Kerstin and Abel, Magdalena and Bäuml, Karl-Heinz and Dreisbach, Gesine and Kliegl, Oliver and Köster, Moritz and Lingnau, Angelika and Volberg, Gregor and Götz, Felix J.}},
  location     = {{Regensburg}},
  publisher    = {{LibreCat University}},
  title        = {{{Context-specific adaptation for head fakes in basketball: a study on player-specific fake-frequency schedules}}},
  doi          = {{10.23668/PSYCHARCHIVES.15242}},
  year         = {{2024}},
}

@inproceedings{57511,
  author       = {{Böer, Nils Tobias and Weigelt, Matthias and Güldenpenning, Iris}},
  editor       = {{Fröber, Kerstin and Abel, Magdalena and Bäuml, Karl-Heinz and Dreisbach, Gesine and Kliegl, Oliver and Köster, Moritz and Lingnau, Angelika and Volberg, Gregor and Götz, Felix J.}},
  keywords     = {{action preparation, perception, movement planning, deception}},
  location     = {{ Regensburg }},
  pages        = {{77}},
  title        = {{{Try harder! - The influence of effort instructions on fake production costs in basketball novices and experts}}},
  year         = {{2024}},
}

@article{57555,
  abstract     = {{Immer öfter nutzen und bedienen wir in unserem Alltag Roboter und Automaten. Sie kommen etwa dort zum Einsatz, wo Tätigkeiten besonders gefährlich oder eintönig sind oder besondere Kraft und Präzision erfordern. Der Beitrag stellt einen experimentierenden Zugang zum Verstehen von und Problemlösen mit Robotern in der inklusiven technischen Bildung im Primarbereich vor.}},
  author       = {{Tenberge, Claudia and Schröer, Franz and Schemel, Nele}},
  journal      = {{Lernen konkret - Fachzeitschrift für den Förderschwerpunkt geistige Entwicklung}},
  pages        = {{26--29}},
  publisher    = {{Westermann}},
  title        = {{{Was macht ein Roboter im Zoo? - Technisches Experimentieren inklusiv gestalten}}},
  volume       = {{4}},
  year         = {{2024}},
}

@article{57619,
  abstract     = {{<jats:p>Ferroelectric liquid crystals exhibiting a chiral smectic C* phase are deposited on z cut periodically poled lithium niobate substrates and investigated by polarized optical microscopy. While the pure substrates placed between crossed polarizers and observed in transmission appear dark, uniformly aligned liquid crystal films deposited on these substrates show alternating domains with varying brightness. This effect can be attributed to the well-known coupling between the direction of the spontaneous polarization and the optical axis in the birefringent ferroelectric smectic C* phase. Quantitative measurements of the tilt angle between the local optical axis and the smectic layer normal confirm antiparallel orientations of spontaneous polarization of the liquid crystal from domain to domain, as expected by the periodic poling of the lithium niobate substrate. This effect provides a valuable non-destructive method of optical inspection of the quality of periodically poled ferroelectric substrates, which plays an important role in achieving quasi-phase-matching in non-linear optical applications.</jats:p>}},
  author       = {{Meier, Patrick A. and Keuker-Baumann, Susanne and Röder, Thorsten and Herrmann, Harald and Ricken, Raimund and Silberhorn, Christine and Kitzerow, Heinz-Siegfried}},
  issn         = {{1896-3757}},
  journal      = {{Opto-Electronics Review}},
  pages        = {{150611--150611}},
  publisher    = {{Polish Academy of Sciences Chancellery}},
  title        = {{{Optical imaging of ferroelectric domains in periodically poled lithium niobate using ferroelectric liquid crystals}}},
  doi          = {{10.24425/opelre.2024.150611}},
  year         = {{2024}},
}

@article{57618,
  abstract     = {{<jats:p>The presence of a polymer network and/or the addition of ferroelectric nanoparticles to a nematic liquid crystal are found to lower transition temperatures and birefringence, which indicates reduced orientational order. In addition, the electro-optic switching voltage is considerably increased when a polymer network is formed by in situ polymerization in the nematic state. However, the resulting polymer network liquid crystal switches at similar voltages as the neat liquid crystal when polymerization is performed at an elevated temperature in the isotropic state. When nanoparticle dispersions are polymerized at an applied DC voltage, the transition temperatures and switching voltages are reduced, yet they are larger than those observed for polymer network liquid crystals without nanoparticles polymerized in the isotropic phase.</jats:p>}},
  author       = {{Nordendorf, Gaby and Jünnemann-Held, Gisela and Lorenz, Alexander and Kitzerow, Heinz-Siegfried}},
  issn         = {{2079-4991}},
  journal      = {{Nanomaterials}},
  number       = {{11}},
  publisher    = {{MDPI AG}},
  title        = {{{Effects of Composition and Polymerization Conditions on the Electro-Optic Performance of Liquid Crystal–Polymer Composites Doped with Ferroelectric Nanoparticles}}},
  doi          = {{10.3390/nano14110961}},
  volume       = {{14}},
  year         = {{2024}},
}

@article{57616,
  author       = {{Becker, David and Meier, Patrick and Kuhlmann, Andreas and Sternemann, Christian and Bock, Harald and Steinrück, Hans-Georg and Kitzerow, Heinz-Siegfried}},
  issn         = {{2637-6113}},
  journal      = {{ACS Applied Electronic Materials}},
  number       = {{2}},
  pages        = {{1234--1243}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Influence of the Deposition Rate on the Alignment and Performance of Perylene-3,4,9,10-tetracarboxylic Tetraethyl Ester in an Organic Light Emitting Diode}}},
  doi          = {{10.1021/acsaelm.3c01586}},
  volume       = {{6}},
  year         = {{2024}},
}

@article{57620,
  author       = {{Zhang, Bingru and Martens, Kevin and Kneer, Luisa and Nguyen, Linh and Kempter, Susanne and Huber, Klaus and Kitzerow, Heinz-Siegfried}},
  issn         = {{1542-1406}},
  journal      = {{Molecular Crystals and Liquid Crystals}},
  pages        = {{1--9}},
  publisher    = {{Informa UK Limited}},
  title        = {{{Investigation of nano-rods fabricated by the DNA origami method using static and dynamic light scattering}}},
  doi          = {{10.1080/15421406.2024.2418067}},
  year         = {{2024}},
}

@article{57625,
  author       = {{Giesselmann, Frank and Kitzerow, Heinz-Siegfried and Zentel, Rudolf}},
  issn         = {{1358-314X}},
  journal      = {{Liquid Crystals Today}},
  number       = {{1}},
  pages        = {{2--9}},
  publisher    = {{Informa UK Limited}},
  title        = {{{Fifty years of liquid crystal research in the mirror of the German Liquid Crystal Conference}}},
  doi          = {{10.1080/1358314x.2024.2415787}},
  volume       = {{33}},
  year         = {{2024}},
}

@inproceedings{57658,
  author       = {{Kehne, Miriam and Neuber, Nils}},
  booktitle    = {{Qualität von Bewegung, Spiel und Sport im Ganztag. Dokumentation des 6. Fachgesprächs am 17. November in Paderborn }},
  pages        = {{5--7}},
  publisher    = {{Universität Münster}},
  title        = {{{Einführung. Qualität von Bewegung, Spiel und Sport im schulischen Ganztag an Grundschulen}}},
  year         = {{2024}},
}

@inbook{54379,
  author       = {{Waltert, Carolin and Kämpfe, Astrid and Steinke, Brigitte}},
  booktitle    = {{Sport, Bewegung und Gesundheit in internationaler Perspektive. Festschrift zur Verabscheidung von Prof. Dr. Hans Peter Brandl-Bredenbeck}},
  editor       = {{Hofmann, Jürgen and Weiß, Kathrin and Breithecker, Jennifer and Kroll, Lena  and Röger-Offergeld, Ulrike}},
  pages        = {{40--50}},
  publisher    = {{Hofmann}},
  title        = {{{Studentisches Gesundheitsmanagement in Deutschland - Ausgangspunkte, Entwicklungen und Status quo}}},
  year         = {{2024}},
}